Ti 添加低 C, N-17%Cr ステンレス鋼薄板のγ値および集合組織(<特集>ステンレス鋼)

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The effect of mill processing variables on the γ-value and texture of Ti-stabilized low C, N-17%Cr stainless steel has been investigated. The results obtained are as follows ; (1) The γ-value in cold rolled and annealed steel sheet is very effectively improved by Ti addition of 0.2-0.3 weight percent but the excessive addition should be avoided because the recrystallization temperature is shifted to a higher range. (2) The optimum γ-value is obtained by the following conditions : Finishing temperature of hot rolling is low. Hot rolled sheet is annealed at 900℃, with a rapid heating rate and a cooling rate as fast as air cooling. Cold reduction is more than 80% and in case of two stage cold rolling and annealing process the distribution between 1st and 2nd reduction is 40% to 60%. Finally, intermediate of final annealing temperature is 850℃. (3) When favorable fine carbo-nitride precipitates are formed in hot rolled sheet before cold rolling by conforming the above processing conditions, these precipitates seem to develop strong {112}<110> deformation texture in high cold reduction and supress {110}<001> and develop strong {554}<225> component in the recrystallized texture, resulting in annealed products with very high γ-values.
社団法人日本鉄鋼協会の論文
1977-04-01